Digital TV test signal generator and method and device for driving flying shuttle rotary wheel thereof

Abstract

The invention provides a digital TV test signal generator and a method and a device for driving a flying shuttle rotary wheel thereof. The method comprises the following steps: initializing a clock counting device for filtering, and counting; initializing a device for marking a rotation direction of the flying shuttle rotary wheel and a device for counting a rotation number of the flying shuttle rotary wheel; interrupting a response of the flying shuttle rotary wheel; when the clock counting device for filtering is smaller than a set value, re-initializing the clock counting device for filtering, and stopping the flying shuttle rotary wheel and returning; and when the clock counting device for filtering is greater than a set value, acquiring a characterization value of the device for marking the rotation direction of the flying shuttle rotary wheel and a counting value of the device for counting the rotation number of the flying shuttle rotary wheel, re-initializing the clock counting device for filtering, and stopping the flying shuttle rotary wheel and returning. Therefore, a method for using the flying shuttle rotary wheel of the digital TV test signal generator, which has the advantages of accurate response and stability, is provided.

Description

technical field [0001] The invention relates to the technical field of digital TV testing, in particular to a digital TV testing signal generator and a driving method and device for a shuttle wheel thereof. Background technique [0002] In the digital TV test system, when the driver program of the jog wheel is written without an operating system, because only simple functions can be realized, it is impossible to realize more complex functions in the digital TV test system. Therefore, most of the time, the driver program of the shuttle wheel is written under the condition of an operating system. [0003] Write the program to drive the shuttle wheel under the operating system, and use the driver program of the shuttle wheel in ARM. Generally, it is written under the LINUX operating system, and use the method of timing query or interrupt to check whether the shuttle wheel is in motion. , and at this time, the action of querying the shuttle wheel depends on its timing query or ...

AI Technical Summary

Problems solved by technology

[0003] Write the program to drive the shuttle wheel under the operating system, and use the driver program of the shuttle wheel in ARM. Generally, it is written under the LINUX operating system, and use the method of timing query or interrupt to check whether the shuttle wheel is in motion. , and at this time, the action of querying the shuttle wheel depends on its timing query or interrupt level. If the interrupt level is set too low, the driving of the shuttle wheel will have poor real-time performance during the working process of the system. When the jog wheel is rotating and the system is executing a high-level program, the jog wheel may lose its rotation, causing the user to rotate the same distance, but the displayed scale is different, making the system not accurate and stable; and When the shuttle wheel rotates to generate disturbances, such as shaking, etc., it will also cause the ARM to produce corresponding actions, increasing the displayed scale, that is, the situation of multi-rotation, which also makes the system not accurate and stable.

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